The journey to Maratua demands commitment—a flight from Balikpapan to Berau, then a second hop on a Twin Otter that touches down on a runway bordered by mangroves and open ocean. You step onto sand so white it stings your eyes, the kind pulverized by centuries of coral and shell. The island curves like a boomerang, enclosing a lagoon where the water shifts from jade to sapphire depending on the depth of the reef below.
“One of the few Indonesian atolls accessible by air, perched on the edge of a 2,000-meter oceanic trench that draws rare pelagic species.”
Coconut trees on Maratua island, East Borneo
Most visitors come for what lies beneath. The house reef begins five strokes from shore, a living wall that plunges hundreds of feet into the Celebes trench. You'll drift past barrel sponges the size of oil drums, schools of barracuda forming silver curtains, and green sea turtles grazing on algae-covered bommies. Dive operators run trips to Kakaban, a nearby island cradling a landlocked lake filled with stingless jellyfish, and to Sangalaki, where manta rays glide through cleaning stations like underwater birds.
Above water, life slows to the rhythm of tide charts and sunlight filtering through thatch. The handful of resorts—ranging from backpacker bungalows to overwater villas—share the island with Bajau fishing families whose stilt houses cling to the reef's edge. Evenings arrive in shades of tangerine and violet, the horizon unmarred by landmass, only the faint silhouette of neighboring atolls dissolving into dusk.
